(4x/5)(35x/12)=21

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Solution for (4x/5)(35x/12)=21 equation: 


x in (-oo:+oo)

((4*x)/5)*((35*x)/12) = 21 // - 21

((4*x)/5)*((35*x)/12)-21 = 0

7/3*x^2 = 21 // : 7/3

x^2 = 9

x^2 = 9 // ^ 1/2

abs(x) = 3

x = 3 or x = -3

x in { 3, -3 }

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